JP2010154787A - Structure and method for connecting pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure and a method for connecting pipes which prevent damage on water-cutoff performance and/or disengagement of pipes even by vertical movement due to frost mound of the ground, land sinkage due to riding of farm working vehicles or the like, or vibration due to passage of wheeled vehicles, and facilitate pipe-connecting work so as to reduce the load on workers and make water supply work smooth. <P>SOLUTION: The pipe connecting structure is configured as follows: a measuring box body 2 of a water division measuring box 1 includes a bottom part 2A and a wall part 2B; and a pipe insertion hole 3 and water division holes 4 are formed in the bottom part 2A and the wall part 2B, respectively. A rubber water-cutoff material 5 provide in the pipe insertion hole 3 to be fitted into a pipe-like socket 9 is formed by integrating a circular base part 6 fitted into the pipe insertion hole 3, a circular bent part 7 bent into an almost U-shape when fitted, and an annular pressure-welded part 8 abutting on the inversion step part of the piping socket 9 and being inverted to be closely fitted when fitted. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to pipes when pipes are connected to various pipe connectors such as a diversion tank and a water supply pipe, a water collection tank and a water supply pipe, or a drainage groove and a drain pipe. The present invention relates to a connection structure and a pipe connection method.

  A conventional connection structure between the water divide 51 and the water supply pipe 55 is shown in FIGS. In the figure, 52 is a concrete casket main body that constitutes the diversion basin 51. The basin body 52 is a water tank whose upper part is opened from a bottom 52A and four wall portions 52B that stand up from the outer edge of the bottom 52A. It is formed in a shape. And the water diversion | basket 51 consists of the structure which formed the water diversion hole 54 in each of the pipe insertion hole 53 in the bottom part 52A of the coffin main body 52, and the wall part 52B of 3 surfaces.

On the other hand, 55 is a water supply pipe made of vinyl chloride embedded in the water tank to supply water from the irrigation canal 1 to the water diversion tank 1, and the front end side of the water supply pipe 55 rises vertically from the ground A. Part 55A. The diversion basin 51 inserts the projecting pipe portion 55 </ b> A from the tube insertion hole 53 into the basin body 52 and is installed on the ground A. And the water which flows into the water diversion tank 51 through the water supply pipe 55 from the water channel is distributed and supplied to each paddy field from each water diversion hole 54.

In the above-described prior art, since the work of inserting and connecting the water supply pipe 55 to the water diversion tank 51 is performed on site, the hole diameter of the pipe insertion hole 53 is large with respect to the water supply pipe 55 in consideration of workability. The gap formed between the water supply pipe 55 and the water supply pipe 55 is filled with mortar 56 to ensure liquid-tightness. Conventionally, since securing liquid-tightness with this mortar is simple and inexpensive, there have been almost no technical proposals for securing liquid-tightness as an alternative (Patent Document 1).
JP 2002-354948 A

As described above, the water stopping method using the mortar 56 in the gap between the pipe insertion hole 53 and the water supply pipe 55 in the conventional water diversion tank 51 has not been technically improved so far. It is left.
First, since the ground A where the watershed 51 is installed has a higher moisture content than other grounds, the watershed 51 and / or the water supply pipe 55 are pushed up by freezing of the ground A in the winter in cold regions. Or, the zurel phenomenon frequently occurs on the left and right. In this way, during the winter season, the watershed 51 and the water supply pipe 55 are repeatedly moved up and down and left and right, thereby causing a gap between the two, and a crack is gradually formed in the mortar 56 to cause water leakage. It is.
Secondly, there is a case where a farm vehicle or the like that has entered the dredger rides on the diversion tank 51, which causes the mortar 56 to crack because the diversion tank 51 sinks or tilts with respect to the water supply pipe 55. Causing water leakage.
Third, in order to prevent water leakage, it is necessary to check the presence or absence of cracks in the mortar 56, but it is often difficult to confirm by sight alone, and the presence or absence of leakage can be confirmed when water is divided into paddy fields. Since water leakage measures will be taken at that time, it will hinder water distribution work.

  The present invention has been made in view of the disadvantages of the prior art, such as behavior such as water divergence, water pipe up-and-down movement, swinging, and subsidence due to frost heaving and riding a farm vehicle, or secular vibration due to vehicle passage, Even if there is a shake due to an earthquake, piping will not drop off or liquid tightness will not be lost, so it will not interfere with the original work such as water distribution and water supply, and also reduce the burden of maintenance inspection work An object of the present invention is to provide a pipe connection structure and a pipe connection method that are easy to perform on-site pipe connection work and excellent in workability.

The means of the present invention according to claim 1 configured to solve the above-described problem includes a tube insertion hole formed in a pipe connection body, a water stop material fitted in the tube insertion hole in a liquid-tight manner, It consists of a tubular socket that is liquid-tightly inserted into a water material and is inserted into a pipe to be connected. The water stop material is an annular base that fits into the tube insertion hole, and a reverse that protrudes in one direction from the annular base. An annular flexible portion having a truncated cone shape and a thick annular pressure contact portion formed on the distal end side of the annular flexible portion and fluid-tightly fitted to the outer peripheral surface of the tubular socket are integrally formed, and the tubular The socket is provided with a reversing step portion that abuts the annular pressure contact portion of the water blocking material and bends the annular flexible portion into a substantially U shape.

The tubular socket is formed integrally with the socket body to be inserted into the pipe and the tip of the socket body, and the upper side where the tip becomes the discharge port slides the annular pressure contact portion of the water stop material. It is good to comprise from the cylindrical guide body which becomes a truncated conical cylindrical guide part which expands in diameter, and the said inversion step part was formed in the lower end side.

  The tubular socket is provided with a socket main body to be inserted into the pipe, and a detachable provided at the distal end side of the socket main body, and the distal end side expands while sliding the annular pressure contact portion of the water blocking material. It is good to comprise from the cylindrical guide body which becomes a head-cone-shaped guide part and the said inversion step part was formed in the lower end side.

  Furthermore, the annular pressure contact portion of the water blocking material may be formed with a plurality of annular grooves on the pressure contact surface with the tubular socket.

According to a fifth aspect of the present invention, there are provided a pipe insertion hole provided in a pipe connection body, a ring base portion that is liquid-tightly fitted in the pipe insertion hole, and an inverted cone that protrudes downward from the ring base portion. A water-retaining material comprising a trapezoidal annular flexible portion and an annular pressure contact portion formed on the distal end side of the annular flexible portion is fitted, and for reversing provided in a tubular socket inserted into the water-stopping material The annular pressure contact portion is brought into contact with the tubular socket by bringing the annular pressure contact portion into contact with the stepped portion and bending the annular flexible portion into a substantially U shape. This is because it is inserted into the pipe.

Since the present invention is configured as described above, the following effects are obtained.
(1) Since a water stop material having an annular flexible portion is fitted to the pipe connection body, and a tubular socket is inserted into the water stop material to connect the pipe, the pipe connection body or Even if the pipe moves up and down, rolls, sinks, or shakes due to an earthquake, the annular flexible part bends to absorb the displacement between the pipe connection body and the pipe, and the pipe is detached from the pipe connection body. And water leakage can be reliably prevented.
(2) The tubular socket is formed integrally with the socket body to be inserted into the pipe and the tip of the socket body, and the upper side where the tip becomes the discharge port expands the diameter while sliding the annular pressure contact portion of the water stop material Since it is composed of a cylindrical guide body having a truncated conical cylindrical guide portion and having the stepped portion for reversal formed on the lower end side, it is easy to insert a tubular socket into the waterstop material. And can be molded at a low cost.
(3) The tubular socket is a socket body that is fitted into the pipe, and a truncated cone that is detachably provided at the distal end side of the socket body, and the distal end side expands the diameter while sliding the annular pressure contact portion of the water stop material. Since it is composed of a cylindrical guide body with a reversing step formed on the lower end side, a water-stopping material can be smoothly inserted into the socket body that connects other instruments to the tip. Can do.
(4) Since the annular pressure contact portion of the water blocking material is formed with a plurality of annular grooves on the pressure contact surface that is in contact with the outer peripheral surface of the tubular socket, water leakage from the tubular socket can be prevented as much as possible.
(5) A water stop material is fitted into the pipe insertion hole of the pipe connection body, the annular pressure contact portion of the water stop material is pressed against the upper end of the tubular socket, and the annular flexible portion is bent into a substantially U shape, thereby annular pressure contact Since the water-stopping material is assembled in a state where it is fitted to the tubular socket by inverting the part, and the pipe is connected to the pipe connection body by inserting the tubular socket into the pipe in the field, the pipe connection body Can be easily and smoothly connected to the pipe, and the displacement between the pipe connection body and the pipe can be absorbed to maintain high liquid tightness.

  Hereinafter, the embodiment of the present invention will be described in detail with reference to the drawings using a water separator as an example. In addition, in this Embodiment, the same code | symbol is attached | subjected and used for the component same as a prior art, and the description is abbreviate | omitted. FIG. 1 shows a water divide 1 installed on the ground A with a water supply pipe 55 connected thereto. In the figure, 1 is a watershed, 2 is a concrete wall made of concrete that constitutes the watershed 1, and the wall 2 is a substantially rectangular bottom 2A and four walls standing from the outer edge of the bottom 2A. It is formed in a water tank shape that is open upward from the part 2B. Reference numeral 3 denotes a tube insertion hole formed in the bottom portion 2A, and the tube insertion hole 3 is integrally formed with an engaging recess 3B on the inner surface 3A. Reference numeral 4 denotes a water diversion hole formed in each of the three wall portions 2B.

  Reference numeral 5 denotes a water-stopping material made of rubber or soft synthetic resin fitted in the tube insertion hole 3 of the bag main body 2. Reference numeral 6 denotes a cylindrical annular base portion constituting the water blocking material 5, and the annular base portion 6 is formed by projecting a substantially hemispherical engaging convex portion 6 </ b> B integrally from a part of the outer peripheral surface 6 </ b> A. By configuring the engagement convex portion 6B into the engagement concave portion 3B of the heel body 2 in this way, the heel body 2 and the water stop material 5 are firmly attached. Even when an external force is applied from the left-right direction, it is reliably prevented from falling off the main body 2 or leaking water.

Here, the waterproofing material 5 made of rubber or soft synthetic resin deteriorates over time with respect to the concrete main body 2 made of concrete, so that the service life is short, and the waterproofing material 5 needs to be replaced after about 10 years. . Therefore, the water-stopping material 5 is exchanged while maintaining the strength and liquid-tightness by forming the engagement convex part 6B of the annular base part 6 into a substantially hemispherical shape as shown in FIG. Sometimes, it can be pulled out from the engaging recess 3B of the main body 2 so that it can be easily exchanged, and the situation where the main body 2 is discarded as the water-stopping material 5 deteriorates is solved.

Reference numeral 7 denotes an inverted trapezoidal annular flexible portion projecting downward from the upper edge 6C of the annular base portion 6. The annular flexible portion 7 is formed thinner than the annular base portion 6 and an annular pressure contact portion 8 described later. Easy to bend. Reference numeral 8 denotes an annular pressure contact portion that is formed thick on the lower end side of the annular flexible portion 7 and closely fits to the outer peripheral surface 55 </ b> A of the water supply pipe 55.

Here, a plurality of annular grooves 8B are provided around the pressure contact surface 8A on the outer periphery of the annular pressure contact portion 8 to enhance liquid tightness with a tubular socket 9 described later. Further, the inner peripheral surface 8C of the annular pressure contact portion 8 is formed in a convex curved surface to be thick, and the water tightness is enhanced so that the annular pressure contact portion 8 presses the tubular socket 9 more strongly. In addition, since the rubber waterproofing material 5 cannot avoid deterioration over time like other rubber products, when deterioration appears, it can be removed from the bag main body 2 and replaced with a new waterproofing material 5. .

  Reference numeral 9 denotes a synthetic resin tubular socket to be fitted into the water supply pipe 55. Reference numeral 10 denotes a connecting pipe portion that constitutes the tubular socket 9, and the connecting pipe portion 10 is formed into a tapered cylinder whose outer peripheral surface 10A is tapered toward the lower end opening so that the waterstop 5 is firmly fitted. Thus, even when the tubular socket 9 moves up and down or swings in conjunction with the water supply pipe 55, or even when the water dividing basin 1 sinks, the water blocking material 5 is prevented from being removed. Further, the inner peripheral surface 10B of the connecting pipe portion 10 is also formed with a taper-like diameter increasing toward the lower end opening, and has a strong fitting force when the protruding pipe portion 55A of the water supply pipe 55 is closely inserted. It is like that. A male screw portion 11 is provided on the upper portion of the connecting pipe portion 10, and an octagonal torque hooking portion 12 is integrally formed between the male screw portion 11 and the connecting pipe portion 10. Here, the male threaded portion 11 is for screwing the water faucet valve 13 as shown in FIG. 1, and the torque hooking portion 12 prevents the connecting tube portion 10 from rotating when screwed. Is for.

Reference numeral 14 denotes a synthetic resin guide cap for smoothly fitting the water stop material 5 into the tubular socket 9. The guide cap 14 has a top surface 14A of the finger inserted holes 14A ₁ for detachable in the center is formed a hollow substantially frusto-conical guide portion 14B, a reversing formed on the periphery of the guide portion 14B 14 C of step parts and the mounting cylinder part 14D which protrudes below from the step part 14C for inversion, and fits in the tubular socket 9 so that attachment or detachment is possible.

  Next, a procedure for connecting the water divide 1 having the above-described configuration to the water supply pipe 55 will be described. First, when molding the concrete fence main body 2 at a factory, the water blocking material 5 is disposed in the mold and is put together with the concrete so as to be integrally provided with the concrete. Next, after the guide cap 14 is screwed onto the male screw portion 11 of the tubular socket 9 and a lubricant is applied to the surface thereof, the tip of the annular pressure contact portion 8 of the water blocking material 5 is fitted and pressed against the guide cap 14. (See FIG. 5). When the tubular socket 9 is pushed from this state, the annular pressure contact portion 8 fitted to the guide cap 14 gradually increases in diameter while sliding, and when the sliding is prevented by coming into contact with the inversion step portion 14C, the thin wall is formed. When the annular flexible portion 7 is bent in a substantially U shape, the annular pressure contact portion 8 is reversed (see FIG. 6), and the pressure contact surface 8A is fitted to the attachment cylinder portion 14D of the guide cap 14. When the tubular socket 9 is further pushed from this state, the annular pressure contact portion 8 slides and is detached from the guide cap 14 and fitted into the tubular socket 9, and the tubular socket 9 is fitted into the water blocking material 5. become. Thereafter, the guide cap 14 is removed from the tubular socket 9.

In this way, the water dividing tub 1 in a state where the tubular socket 9 is fitted to the water blocking material 5 is transported to the site, and the water dividing tub in which the tubular socket 9 is fitted to the protruding pipe portion 55A of the water supply pipe 55 from above. 1 is lowered, and the tubular socket 9 is tightly inserted into the water supply pipe 55 to be grounded to the ground A. Finally, the insertion state of the annular pressure contact portion 8 is confirmed, and if necessary, fine adjustment is performed to complete the operation of connecting the water diversion tank 1 to the water supply pipe 55 and installing it on the ground A.

  According to this embodiment, between the pipe insertion hole 3 of the water divide 1 and the water supply pipe 55 is liquid-tightly closed by the water blocking material 5, thereby reliably preventing water leakage from the water divide 1. be able to. Moreover, the water-stopping material 5 is formed with an annular flexible portion 7, so that the water-stopping material 5 can be used even if the watershed 1 moves up and down due to the freezing of the ground A or sinks when the vehicle rides up. Since the annular flexible portion 7 can be bent to absorb the deviation from the water supply pipe 55, the water diversion tank 1 can maintain the water stop function for a long period of time without impairing the water stop.

  According to the present embodiment, it is possible to connect the water diversion tank 1 and the water supply pipe 55 simply by inserting the tubular socket 9 fitted to the water blocking material 5 into the water supply pipe 55, so that connection at the site is performed. Work can be performed easily and in a short time.

  In this embodiment, the tubular socket 9 is provided with the male screw portion 10 for attaching the water faucet valve 13 and the torque hooking portion 12, but when the water tap valve 13 is not attached, the male screw portion. What is necessary is just to make it the tubular socket which does not provide 10 and the torque application part 12. FIG.

  FIG. 9 shows a modification of the tubular socket in which the guide cap is integrally provided. In the figure, 21 is a tubular socket made of synthetic resin, 22 is a socket body constituting the tubular socket 21, and the socket body 22 has an inner peripheral surface 22A whose diameter increases in a tapered shape toward the lower end opening, and an outer peripheral surface 22B. Is made of a straight cylinder, and the inner peripheral surface 22A is closely inserted into the protruding pipe portion 55A of the water supply pipe 55 so as to have a strong fitting force.

Reference numeral 23 denotes a guide cap formed integrally with the upper end of the socket body 22. The guide cap 23 consists substantially frusto conical guide portion 23A which becomes water inlet 23A ₁ which communicates with the upper end opening water supply pipe 55, an inverting step portion 23B formed at the lower end of the guide portion 23A The outer diameter of the reversing step 23B is the same as that of the socket body 22.

The tubular socket 21 is configured as described above, and the operation of inserting the socket body 22 into the water-stopping material 5 via the guide cap 23 is not different from the embodiment, but the outer diameter of the inversion step 23B and the socket Since the main body 22 has the same diameter, the annular pressure contact portion 8 that is reversed by bending the annular flexible portion 7 into a substantially U shape can be smoothly inserted into the socket body 22. Further, since the socket body 22 and the guide cap 23 are integrated, the number of constituent members is reduced, and the cost can be reduced.

  In the present embodiment, an example in which the water-stopping material 5 is fitted to the bottom 2A of the water dividing basin 1 has been described. For example, a water-stopping material is provided on a concrete plate so as to be integrated with a pipe insertion hole. You may make it fit a concrete board by forming a fitting hole in the bottom board or side board of the existing watershed. Moreover, the installation position is not limited to the bottom portion 2A, and can also be used when the water supply pipe 55 is connected sideways to the wall portion 2B.

  Furthermore, the pipe connection structure according to the present invention is not limited to the water divide 1, but various pipes connected to the pipe connection body such as a water collecting basin, a side ditch, an elevated highway or a drainage ditch of an iron bridge, etc. It can be used in some cases.

1 to 9 relate to an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of a water divide. It is a half sectional view of a water stop material. It is an external view of the tubular socket which fractured | ruptured one part. It is a fragmentary sectional view of a guide cap. It is explanatory drawing of the state which contacted the water stop material to the guide cap. It is explanatory drawing of the state which reversed the annular flexible part of the water stop material with the guide cap. It is explanatory drawing of the state which inserted the water stop material in the tubular socket. It is explanatory drawing of the state which connects a tubular socket to a water supply pipe. It is a half sectional view of a tubular socket provided with a guide cap integrally. FIGS. 10 and 11 relate to the prior art, and FIG. 10 is a partially broken perspective view showing a connection state between a water divide and a water supply pipe. It is a longitudinal cross-sectional view of the state which connected the water diversion tank and the water supply pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dividing body 2 Shaft body 2A Bottom part 2B Wall part 3 Pipe insertion hole 4 Dividing hole 5 Water blocking material 6 Annular base part 7 Annular flexible part 8 Annular pressure contact part 8A Annular contact surface 8B Annular groove 9 Tubular socket 10B Outer peripheral surface 14 Guide Cap 55 water supply pipe

Claims (5)

A pipe insertion hole formed in the pipe connection body, a water stop material that is liquid-tightly fitted in the pipe insertion hole, and a tubular socket that is liquid-tightly inserted into the water stop material and is fitted into the pipe to be connected The water stop material is formed on an annular base portion that fits into the tube insertion hole, an inverted frustoconical annular flexible portion that protrudes in one direction from the annular base portion, and a distal end side of the annular flexible portion. And a thick annular pressure contact portion that is liquid-tightly fitted to the outer peripheral surface of the tubular socket, and the tubular socket contacts the annular pressure contact portion of the water-stopping material so that the annular flexible portion is A pipe connection structure characterized by comprising a step portion for reversal that is bent into a substantially U shape.   The tubular socket is formed integrally with a socket main body to be inserted into the pipe and a tip of the socket main body, and the upper side where the tip becomes a discharge port expands while sliding the annular pressure contact portion of the water stop material. The pipe connection structure according to claim 1, wherein the pipe connection structure includes a cylindrical guide portion having a truncated conical shape with a diameter, and a cylindrical guide body having the inversion step portion formed on a lower end side.   The tubular socket includes a socket main body to be inserted into the pipe, and a truncated cone that is detachably provided at the distal end side of the socket main body, and the distal end side expands the diameter while sliding the annular pressure contact portion of the water blocking material. The pipe connection structure according to claim 1, wherein the pipe connection structure is formed of a cylindrical guide body having a cylindrical guide portion and having the inversion step portion formed on a lower end side.   The pipe connection structure according to claim 1, wherein the annular pressure contact portion of the water stop material has a plurality of annular grooves formed on a pressure contact surface with the tubular socket.   An annular base portion that is liquid-tightly fitted into the tube insertion hole, a reverse frustoconical annular flexible portion that protrudes downward from the annular base portion, and the annular flexible portion. A water stop material comprising an annular pressure contact portion formed on the distal end side of the ring, and the annular pressure contact portion is brought into contact with a reversing step provided in a tubular socket inserted into the water stop material. A pipe connection method in which the tubular socket is inserted into a pipe in a state where the annular pressure contact part is fitted in a liquid-tight manner to the tubular socket by bending the flexible part into a substantially U shape.

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